From the Park Avenue overpass, you can see quite a bit of action going on below you at the 23rd Street diamond. BNSF trains headed to or from the Joint Line cross the diamond (on one of the two main tracks). The Buck Main crosses the north end of the Joint Line, connection Union Station with Prospect Junction (and beyond). BNSF also uses the Buck Main to wye power. Such was the case here as two SD40-2s are being wyed so they can be taken to the "house".
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